feat: ✨ add libravatar API

.env.example

@@ -32,12 +32,12 @@ LIBRAVATAR__ENABLED=false
 # Either jpeg or png. The type of image the libravatar API serves. Default png.
 LIBRAVATAR__FORMAT=png
 
-# What to do when libravatar requests a resolution that is not a valid output resolution. Default round.
+# What to do when libravatar requests a resolution that is not a valid output resolution. Default nearest.
 # Modes:
-# round - Round to the nearest image size.
+# nearest - Use the nearest image size.
 # nocache - Render the image at the requested size without saving it to disk.
 # cache - Render the image at the requested size and save it to disk.
-LIBRAVATAR__GENERATION_MODE=round
+LIBRAVATAR__GENERATION_MODE=nearest
 
 # Prisma database URL
 DATABASE_URL=file:../.data/data.db

prisma/migrations/20241121004601_add_emailhashes/migration.sql

@@ -0,0 +1,6 @@
+-- CreateTable
+CREATE TABLE "EmailHashes" (
+    "forUserId" TEXT NOT NULL PRIMARY KEY,
+    "sha256" BLOB NOT NULL,
+    CONSTRAINT "EmailHashes_forUserId_fkey" FOREIGN KEY ("forUserId") REFERENCES "User" ("userId") ON DELETE RESTRICT ON UPDATE CASCADE
+);

prisma/migrations/20241121005623_add_md5/migration.sql

@@ -0,0 +1,20 @@
+/*
+  Warnings:
+
+  - Added the required column `md5` to the `EmailHashes` table without a default value. This is not possible if the table is not empty.
+
+*/
+-- RedefineTables
+PRAGMA defer_foreign_keys=ON;
+PRAGMA foreign_keys=OFF;
+CREATE TABLE "new_EmailHashes" (
+    "forUserId" TEXT NOT NULL PRIMARY KEY,
+    "sha256" BLOB NOT NULL,
+    "md5" BLOB NOT NULL,
+    CONSTRAINT "EmailHashes_forUserId_fkey" FOREIGN KEY ("forUserId") REFERENCES "User" ("userId") ON DELETE RESTRICT ON UPDATE CASCADE
+);
+INSERT INTO "new_EmailHashes" ("forUserId", "sha256") SELECT "forUserId", "sha256" FROM "EmailHashes";
+DROP TABLE "EmailHashes";
+ALTER TABLE "new_EmailHashes" RENAME TO "EmailHashes";
+PRAGMA foreign_keys=ON;
+PRAGMA defer_foreign_keys=OFF;

prisma/schema.prisma

@@ -24,6 +24,7 @@ model User {
   name        String?
   avatars     Avatar[]
   webhooks    Webhook[]
+  emailHashes EmailHashes?
 
   currentAvatarId String? @unique
   currentAvatar   Avatar? @relation("CurrentAvatar", fields: [currentAvatarId], references: [id])
@@ -48,3 +49,10 @@ model Webhook {
 
   @@unique([url, userId])
 }
+
+model EmailHashes {
+  forUserId String @id
+  user      User   @relation(fields: [forUserId], references: [userId])
+  sha256    Bytes
+  md5       Bytes
+}

src/lib/avatars.ts

@@ -15,6 +15,16 @@ await mkdir(defaultAvatarDirectory, { recursive: true })
 
 export const missingAvatarQueue = new Map<string, Promise<string>>()
 
+export async function getAvailableSizesInPath(path: string) {
+    return (await readdir(path)).map(
+        e =>
+            [parseInt(e.match(/(.*)\..*/)?.[1] || "", 10), e] as [
+                number,
+                string,
+            ]
+    )
+}
+
 /**
  * @description Generate an avatar at the selected size and format
  * @param path Path to the avatar directory
@@ -32,25 +42,14 @@ export function generateMissingAvatar(
 
     let prom = new Promise<string>(async (res, rej) => {
         // locate best quality currently available
-        const av = await readdir(path)
-        // this can probably be done better but I DON'T GIVE A FUCK  !!!!
         const pathToBestQualityImg =
             path == defaultAvatarDirectory
                 ? "./assets/default.png"
                 : join(
                       path,
-                      av
+                      (await getAvailableSizesInPath(path)).sort(
-                          .map(
+                          ([a], [b]) => b - a
-                              e =>
+                      )[0][1]
-                                  [
-                                      parseInt(
-                                          e.match(/(.*)\..*/)?.[1] || "",
-                                          10
-                                      ),
-                                      e,
-                                  ] as [number, string]
-                          )
-                          .sort(([a], [b]) => b - a)[0][1]
                   )
 
         const buf = await readFile(pathToBestQualityImg)
@@ -72,7 +71,8 @@ export function generateMissingAvatar(
 export async function getPathToAvatar(
     avatarId?: string,
     size: number = configuration.images.default_resolution,
-    fmt?: string
+    fmt?: string,
+    bypass_size_limits: boolean = false
 ) {
     if (avatarId?.includes("/")) throw Error("AvatarID cannot include /")
 
@@ -112,7 +112,10 @@ export async function getPathToAvatar(
         .find(s => parseInt(s.name.match(/(.*)\..*/)?.[1] || "", 10) == size)
 
     if (targetAvatar) return join(targetAvatarDirectory, targetAvatar.name)
-    else if (configuration.images.output_resolutions.includes(size))
+    else if (
+        configuration.images.output_resolutions.includes(size) ||
+        bypass_size_limits
+    )
         return makeMissing() // generate image at this size for the specified format
 }
 

src/lib/configuration.ts

@@ -59,11 +59,11 @@ const configuration = {
                   )
                       ? env.LIBRAVATAR__FORMAT
                       : "jpeg") as keyof FormatEnum,
-                  resize_mode: ["round", "nocache", "cache"].includes(
+                  resize_mode: (["nearest", "nocache", "cache"].includes(
                       env.LIBRAVATAR__GENERATION_MODE
                   )
                       ? env.LIBRAVATAR__GENERATION_MODE
-                      : "round",
+                      : "nearest") as "nearest" | "nocache" | "cache",
               },
           }
         : {}),

src/lib/oidc.ts

@@ -2,9 +2,14 @@ import { error, redirect, type Cookies } from "@sveltejs/kit"
 import configuration from "./configuration"
 import type { User } from "./types"
 import { prisma } from "./clientsingleton"
+import type { EmailHashes } from "@prisma/client"
+import crypto from "node:crypto"
 
 // Map of OAuth2 states
-const states = new Map<string, { redirect_uri: string, timeout: ReturnType<typeof setTimeout> }>()
+const states = new Map<
+    string,
+    { redirect_uri: string; timeout: ReturnType<typeof setTimeout> }
+>()
 // Cache of userinfo
 const userInfoCache = new Map<string, User>()
 
@@ -22,7 +27,7 @@ export function launchLogin(url: string) {
         client_id: configuration.oauth2.client.id,
         redirect_uri: url,
         scope: configuration.oauth2.client.scopes,
-        state
+        state,
     })
     // Did not think this would work lmao
     const target = new URL(
@@ -33,17 +38,10 @@ export function launchLogin(url: string) {
     // cache state
     // NO IDEA IF THIS WORKS IN SERVERLESS LOL
     // not like this is going to be running serverless anyway
-    states
+    states.set(state, {
-        .set(
+        timeout: setTimeout(() => states.delete(state), 2 * 60 * 1000),
-            state,
+        redirect_uri: url,
-            {
+    })
-                timeout: setTimeout(
-                    () => states.delete(state),
-                    2*60*1000
-                ),
-                redirect_uri: url
-            }
-        )
 
     throw redirect(302, target.toString())
 }
@@ -55,38 +53,46 @@ export function launchLogin(url: string) {
  */
 export async function getNewToken(
     params:
-        {grant_type: "authorization_code", redirect_uri: string, code: string}
+        | {
-        | {grant_type: "refresh_token", refresh_token: string}
+              grant_type: "authorization_code"
+              redirect_uri: string
+              code: string
+          }
+        | { grant_type: "refresh_token"; refresh_token: string }
 ) {
     // Generate a query string for the request
     const searchParams = new URLSearchParams({
         ...params,
         client_id: configuration.oauth2.client.id,
-            client_secret: configuration.oauth2.client.secret
+        client_secret: configuration.oauth2.client.secret,
     })
 
     // send request to retrieve tokens
     let res = await fetch(configuration.oauth2.endpoints.token, {
         method: "POST",
-            body: searchParams // this standard sucks, actually 
+        body: searchParams, // this standard sucks, actually
     })
     if (res.ok)
-            return (await res.json()) as { access_token: string, expires_in: number, refresh_token?: string }
+        return (await res.json()) as {
+            access_token: string
+            expires_in: number
+            refresh_token?: string
+        }
 }
 
 export function fetchUserInfo(token: string) {
     // try fetching new userinfo
     return fetch(configuration.userinfo.route, {
         headers: {
-            "Authorization": `Bearer ${token}`
+            Authorization: `Bearer ${token}`,
-        }
+        },
     })
 }
 
 export async function getUserInfo(id: string) {
     // fetch token information
     const tokenInfo = await prisma.token.findUnique({
-        where: { id }
+        where: { id },
     })
     if (!tokenInfo) return
 
@@ -103,15 +109,15 @@ export async function getUserInfo(id: string) {
             if (!tokenInfo.refreshToken) return // no refresh token. back out
             let token = await getNewToken({
                 grant_type: "refresh_token",
-                refresh_token: tokenInfo.refreshToken
+                refresh_token: tokenInfo.refreshToken,
             })
             if (!token) return // refresh failed. back out
             await prisma.token.update({
                 where: { id },
                 data: {
                     token: token.access_token,
-                    refreshToken: token.refresh_token
+                    refreshToken: token.refresh_token,
-                }
+                },
             })
 
             userInfoRequest = await fetchUserInfo(token.access_token)
@@ -120,6 +126,20 @@ export async function getUserInfo(id: string) {
 
         userInfo = await userInfoRequest.json()
 
+        // get emailHashes
+
+        let emailHashes: Omit<EmailHashes, "forUserId"> | undefined = undefined
+
+        if (userInfo.email) {
+            emailHashes = {
+                sha256: crypto
+                    .createHash("sha256")
+                    .update(userInfo.email)
+                    .digest(),
+                md5: crypto.createHash("md5").update(userInfo.email).digest(),
+            }
+        }
+
         // update user
         await prisma.user.upsert({
             where: {
@@ -127,13 +147,30 @@ export async function getUserInfo(id: string) {
             },
             update: {
                 identifier: userInfo[configuration.userinfo.identifier],
-                name: userInfo.name
+                name: userInfo.name,
+                ...(emailHashes
+                    ? {
+                          emailHashes: {
+                              upsert: {
+                                  create: emailHashes,
+                                  update: emailHashes,
+                              },
+                          },
+                      }
+                    : {}),
             },
             create: {
                 userId: userInfo.sub,
                 identifier: userInfo[configuration.userinfo.identifier],
-                name: userInfo.name
+                name: userInfo.name,
+                ...(emailHashes
+                    ? {
+                          emailHashes: {
+                              create: emailHashes,
+                          },
                       }
+                    : {}),
+            },
         })
 
         // cache userinfo
@@ -141,23 +178,27 @@ export async function getUserInfo(id: string) {
         setTimeout(() => userInfoCache.delete(tokenInfo.owner), 15 * 60 * 1000)
     }
 
-    return { ...userInfo, identifier: userInfo[configuration.userinfo.identifier] } as User
+    return {
+        ...userInfo,
+        identifier: userInfo[configuration.userinfo.identifier],
+    } as User
 }
 
 export function deleteToken(id: string) {
     prisma.token.delete({
-        where: {id}
+        where: { id },
     })
 }
 
 export async function getRequestUser(request: Request, cookies: Cookies) {
-    const params = new URLSearchParams(request.url.split("?").slice(1).join("?"))
+    const params = new URLSearchParams(
+        request.url.split("?").slice(1).join("?")
+    )
     let token = cookies.get("token")
     // log user in
     if (!token && params.has("code") && params.has("state")) {
         // check if state is real
-        if (!states.has(params.get("state")!))
+        if (!states.has(params.get("state")!)) throw error(401, "bad state")
-            throw error(401, "bad state")
 
         // get state
         let state = states.get(params.get("state")!)!
@@ -168,23 +209,28 @@ export async function getRequestUser(request: Request, cookies: Cookies) {
         let tokens = await getNewToken({
             grant_type: "authorization_code",
             redirect_uri: state.redirect_uri,
-            code: params.get("code")!
+            code: params.get("code")!,
         })
 
         if (!tokens)
-            throw error(401, "Couldn't get initial token, code may be incorrect")
+            throw error(
+                401,
+                "Couldn't get initial token, code may be incorrect"
+            )
 
         // fetch userdata
         // could cache this, but lazy
 
-        let userInfo = await (await fetchUserInfo(tokens.access_token)).json() as User
+        let userInfo = (await (
+            await fetchUserInfo(tokens.access_token)
+        ).json()) as User
         // create a new token
         let newToken = await prisma.token.create({
             data: {
                 token: tokens.access_token,
                 refreshToken: tokens.refresh_token,
-                owner: userInfo.sub
+                owner: userInfo.sub,
-            }
+            },
         })
 
         token = newToken.id

src/lib/types.ts

@@ -2,4 +2,5 @@ export interface User {
     name: string
     sub: string
     identifier: string
+    email?: string
 }

src/routes/avatar/[hash]/+server.ts

@@ -0,0 +1,139 @@
+import {
+    avatarDirectory,
+    getAvailableSizesInPath,
+    getPathToAvatar,
+    getPathToAvatarForIdentifier,
+    renderAvatar,
+} from "$lib/avatars.js"
+import { prisma } from "$lib/clientsingleton.js"
+import configuration from "$lib/configuration.js"
+import { getRequestUser } from "$lib/oidc.js"
+import { error, redirect } from "@sveltejs/kit"
+import { readFile } from "fs/promises"
+import mime from "mime"
+import { join } from "path"
+
+export async function GET({ params: { hash }, url }) {
+    if (!configuration.libravatar)
+        throw error(501, "The libravatar API is disabled on this server")
+
+    const requestedSize = parseInt(url.searchParams.get("s") || "0", 10) || 80
+    const fallback = url.searchParams.get("d") || "mm"
+    const forceDefault = url.searchParams.get("f") === "y"
+    const hashBinary = Buffer.from(hash, "hex")
+    let size = requestedSize > 512 || requestedSize < 1 ? 80 : requestedSize
+
+    // try to find the user from the hashBinary
+
+    const avatarId = (
+        await prisma.emailHashes.findFirst({
+            where: {
+                OR: [
+                    {
+                        sha256: hashBinary,
+                    },
+                    {
+                        md5: hashBinary,
+                    },
+                ],
+            },
+            select: {
+                user: {
+                    select: {
+                        currentAvatarId: true,
+                    },
+                },
+            },
+        })
+    )?.user.currentAvatarId
+
+    let avPath: string | undefined
+
+    if (!forceDefault && avatarId)
+        switch (configuration.libravatar.resize_mode) {
+            case "nearest":
+                // find nearest size available
+                size = configuration.images.output_resolutions.includes(size)
+                    ? size
+                    : configuration.images.output_resolutions
+                          .slice()
+                          .sort(
+                              (a, b) => Math.abs(size - a) - Math.abs(size - b)
+                          )[0]
+            // don't break here so it goes into the cache case
+            case "cache":
+                // get path to avatar
+                avPath = await getPathToAvatar(
+                    avatarId,
+                    size,
+                    configuration.libravatar.output_format,
+                    // bypass size limits if cache
+                    // nearest shouldn't trigger this anyway but just in case
+                    configuration.libravatar.resize_mode == "cache"
+                )
+                break
+            case "nocache":
+                const avatarPath = join(avatarDirectory, avatarId),
+                    avImgs = await getAvailableSizesInPath(avatarPath),
+                    avImageSizes = avImgs.map(e => e[0])
+
+                if (!avImageSizes.includes(size)) {
+                    // we need to scale down
+                    // find the next largest image resolution
+                    let sortedSizes = [...avImageSizes, size].sort(
+                        (a, b) => a - b
+                    )
+
+                    // try to get higher res if exists, otherwise get lower
+                    let scaleDownFrom = join(
+                        avatarPath,
+                        avImgs[
+                            avImageSizes.indexOf(
+                                sortedSizes[sortedSizes.indexOf(size) + 1] ||
+                                    sortedSizes[sortedSizes.indexOf(size) - 1]
+                            )
+                        ][1]
+                    )
+
+                    // render an avatar
+                    let avatar = await renderAvatar(
+                        await readFile(scaleDownFrom),
+                        size,
+                        configuration.libravatar.output_format
+                    )
+
+                    // serve image
+                    return new Response(await avatar.img.toBuffer(), {
+                        headers: {
+                            "Content-Type":
+                                mime.getType(avatar.extension!) || "",
+                        },
+                    })
+                } else {
+                    // we don't need to scale down. serve this image
+                    avPath = join(
+                        avatarPath,
+                        avImgs[avImageSizes.indexOf(size)][1]
+                    )
+                }
+        }
+
+    if (!avPath) {
+        switch (fallback) {
+            case "404":
+                throw error(404, "Avatar not found")
+            case "mm":
+            case "mp":
+                // TODO: serve a default image at the correct size
+                throw redirect(302, "/avatars/default/image")
+            default:
+                throw redirect(302, fallback)
+        }
+    }
+
+    return new Response(await readFile(avPath), {
+        headers: {
+            "Content-Type": mime.getType(avPath) || "",
+        },
+    })
+}